CN103885660B - A kind of In-cell touch panel and display device - Google Patents
A kind of In-cell touch panel and display device Download PDFInfo
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- CN103885660B CN103885660B CN201410090141.7A CN201410090141A CN103885660B CN 103885660 B CN103885660 B CN 103885660B CN 201410090141 A CN201410090141 A CN 201410090141A CN 103885660 B CN103885660 B CN 103885660B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
Abstract
The invention discloses a kind of In-cell touch panel and display device, utilize the principle of self-capacitance in touch-screen, arrange multiple same layer to arrange and the self-capacitance electrode of mutually insulated, touch detection chip can judge position of touch by the capacitance variation detecting respective capacitance electrode.Because body capacitance acts on whole self-capacitance, the projected capacitive in mutual capacitance is only acted on relative to body capacitance, the touch-control variable quantity touched caused by screen by human body can be larger, therefore effectively can improve the signal to noise ratio (S/N ratio) of touch-control, thus improve the accuracy of touch-control sensing.And, need when being arranged between upper substrate and flatness layer relative to self-capacitance electrode that composition is carried out to flatness layer and expose the conducting tie point arranged with the same layer of self-capacitance electrode, conducting tie point is electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, self-capacitance electrode is arranged between the flatness layer of upper substrate and chock insulator matter by the present invention, can save flatness layer composition, save manufacture craft.
Description
Technical field
The present invention relates to technical field of touch control, particularly relate to a kind of In-cell touch panel and display device.
Background technology
Along with the develop rapidly of display technique, touch-screen (TouchScreenPanel) is gradually in the life of people.At present, touch-screen can be divided into according to composition structure: external hanging type touch-screen (AddonModeTouchPanel), covering surfaces formula touch-screen (OnCellTouchPanel) and In-cell touch panel (InCellTouchPanel).Wherein, external hanging type touch-screen is by touch-screen and LCDs (LiquidCrystalDisplay, LCD) separately produce, then fitting to the LCDs becoming together and have touch function, there is the shortcomings such as cost of manufacture is higher, light transmission rate is lower, module is thicker in external hanging type touch-screen.And the touch control electrode of touch-screen is embedded in LCDs inside by In-cell touch panel, can the thickness of thinning module entirety, greatly can reduce again the cost of manufacture of touch-screen, be subject to the favor of Ge great panel producer.
At present, existing Capacitance-type built-in (Incell) touch-screen is at existing TFT(ThinFilmTransistor, Thin Film Transistor (TFT)) array base palte directly increases in addition touch-control drive electrode and touch-control sensing electrode realize, namely the stripe-like ITO electrodes that two-layer mutual antarafacial intersects is made on the surface of tft array substrate, this two-layer ITO(IndiumTinOxides, indium tin metal oxide) electrode is respectively as the touch-control drive electrode of touch-screen and touch-control sensing electrode, as shown in Figure 1, between the touch-control drive electrode Tx of horizontally set and the touch-control sensing electrode Rx longitudinally arranged, coupling produces mutual capacitance C
m(MutualCapacitance), when pointing touching screen, the touching of finger can change mutual capacitance C
mvalue, touch detecting apparatus is by detecting electric capacity C before and after finger touching
mthe knots modification of corresponding electric current, thus detect the position of finger touch point.
Two kinds of mutual capacitance C can be formed between the touch-control drive electrode Tx and the touch-control sensing electrode Rx longitudinally arranged of horizontally set
m, as shown in Figure 1, one is to realizing the effective projected capacitive of touch function (curve with arrow in Fig. 1 is projected capacitive), during finger touching screen, can change projected capacitive value; Another kind be to realize touch function invalid just to electric capacity (straight line of band arrow is for just to electric capacity), during finger touching screen, just can not change to capacitance.
In the structural design of above-mentioned capacitance type in-cell touch panel, only can with the projected capacitive generation coupling in mutual capacitance in body capacitance, what touch-control drive electrode and touch-control sensing electrode were located to be formed on the right side just can make the signal to noise ratio (S/N ratio) of touch-screen reduce to electric capacity, have impact on the accuracy of touch-control sensing in In-cell touch panel.Further, need on existing tft array substrate, increase two-layer new rete, causing needing when making tft array substrate to increase new technique, production cost being increased, is unfavorable for enhancing productivity.
Summary of the invention
In view of this, embodiments provide a kind of In-cell touch panel and display device, in order to realize that touch accuracy is higher, cost is lower, production efficiency is higher and the In-cell touch panel that transmitance is higher.
Therefore, a kind of In-cell touch panel that the embodiment of the present invention provides, comprises the upper substrate and infrabasal plate that are oppositely arranged, and described upper substrate has flatness layer towards the side of described infrabasal plate and is positioned at dottle pin nitride layer on flatness layer, also comprises:
The multiple same layer be arranged between described flatness layer and described dottle pin nitride layer is arranged and the self-capacitance electrode of mutually insulated, and in the touch-control time period by detecting the capacitance variation of each described self-capacitance electrode to judge the touch detection chip of position of touch.
The above-mentioned In-cell touch panel that the embodiment of the present invention provides, utilize the principle of self-capacitance to arrange multiple same layer at the upper substrate of touch-screen to arrange and the self-capacitance electrode of mutually insulated, when human body does not touch screen, the electric capacity that respective capacitance electrode bears is a fixed value, when human body touching screen, the electric capacity that corresponding self-capacitance electrode bears is fixed value superposition body capacitance, and touch detection chip can judge position of touch in the touch-control time period by the capacitance variation detecting respective capacitance electrode.Because body capacitance can act on whole self-capacitance, the projected capacitive in mutual capacitance only can be acted on relative to body capacitance, the touch-control variable quantity touched caused by screen by human body can be larger, therefore effectively can improve the signal to noise ratio (S/N ratio) of touch-control, thus improve the accuracy of touch-control sensing.And, need in existing array base palte, increase two-layer new rete when realizing touch controllable function relative to employing mutual capacitance principle, only need to increase one deck self-capacitance electrode in the touch-screen that the embodiment of the present invention provides and can realize touch controllable function, save production cost, improve production efficiency.
Further, need when being arranged between upper substrate and flatness layer relative to self-capacitance electrode that composition is carried out to flatness layer and expose the conducting tie point arranged with the same layer of self-capacitance electrode, this conducting tie point is electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, because self-capacitance electrode is arranged between the flatness layer of upper substrate and dottle pin nitride layer in the touch-screen that the embodiment of the present invention provides, therefore, can save and composition is carried out to flatness layer, the conducting tie point arranged with the same layer of self-capacitance electrode can be directly electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, save manufacture craft.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, also comprise: be arranged at the black matrix layer between described upper substrate and described infrabasal plate;
The orthogonal projection of figure on described infrabasal plate of each described self-capacitance electrode is positioned at the figure region of described black matrix layer.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, the figure of each described self-capacitance electrode is the fenestral fabric that orthogonal projection on described infrabasal plate is positioned at the figure region of described black matrix layer.
In a kind of possible implementation, the above-mentioned In-cell touch panel that the embodiment of the present invention provides, also comprises: with each described self-capacitance electrode wire one to one, and with described self-capacitance electrode conducting tie point one to one; Wherein,
The orthogonal projection of each described wire on described infrabasal plate is positioned at the figure region of described black matrix layer, and each described conducting tie point is arranged on the frame adhesive region of described In-cell touch panel;
After each described self-capacitance electrode is connected to described conducting tie point by described wire, be electrically connected by the splicing ear of the cabling and described touch detection chip that are positioned at described frame adhesive region.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, each described wire and each described self-capacitance electrode are arranged with layer.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, the frame adhesive region of described In-cell touch panel has four sides, and described conducting tie point all has distribution at four sides of described frame adhesive region.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, the conducting tie point of answering with each described self-capacitance electrode pair is distributed in the side edge from the nearest frame adhesive region of described self-capacitance electrode distance.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, described wire and the different layer of described self-capacitance electrode are arranged, described wire is arranged between described upper substrate and described flatness layer, and described self-capacitance electrode is electrically connected by via hole with corresponding wire.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, the side that adjacent two described self-capacitance electrodes are relative is broken line.
In a kind of possible implementation, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, what two adjacent self-capacitance electrodes were relative all has step structure for the side of broken line, and two step structure shapes unanimously and mutually mate; And/or,
What two adjacent self-capacitance electrodes were relative all has concave/convex-shaped structure for the side of broken line, and two concave/convex-shaped structure shapes unanimously and mutually mate.
A kind of display device that the embodiment of the present invention provides, comprises the above-mentioned In-cell touch panel that the embodiment of the present invention provides.
Accompanying drawing explanation
Fig. 1 is the electric capacity schematic diagram produced between existing touch-control drive electrode and touch-control sensing electrode;
The structural representation of the In-cell touch panel that Fig. 2 provides for the embodiment of the present invention;
The driver' s timing schematic diagram of the In-cell touch panel that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a self-capacitance electrode in the In-cell touch panel that Fig. 4 provides for the embodiment of the present invention;
The wire adopting traditional cabling mode to arrange with layer in the In-cell touch panel that Fig. 5 a provides for the embodiment of the present invention and the schematic diagram of self-capacitance electrode;
The schematic diagram that in the In-cell touch panel that Fig. 5 b provides for the embodiment of the present invention, wire and self-capacitance electrode are arranged with layer;
The self-capacitance electrode compartments schematic diagram of viewing area in the In-cell touch panel that Fig. 6 provides for the embodiment of the present invention;
The self-capacitance electrode arranged with layer in each region in the In-cell touch panel that Fig. 7 provides for the embodiment of the present invention and the connection diagram of conducting tie point;
The schematic diagram that in the In-cell touch panel that Fig. 8 provides for the embodiment of the present invention, the different layer of self-capacitance electrode and wire is arranged;
The connection diagram of the different self-capacitance electrode that arranges layer by layer in each region and conducting tie point in the In-cell touch panel that Fig. 9 provides for the embodiment of the present invention;
The side that the self-capacitance electrode that Figure 10 a and Figure 10 b are respectively adjacent in the In-cell touch panel that the embodiment of the present invention provides is relative is set to the structural representation of broken line.
Embodiment
Below in conjunction with accompanying drawing, the In-cell touch panel provide the embodiment of the present invention and the embodiment of display device are described in detail.
In accompanying drawing, the thickness of each tunic layer and shape do not reflect actual proportions, and object just signal illustrates content of the present invention.
A kind of In-cell touch panel that the embodiment of the present invention provides, as shown in Figure 2, comprises the upper substrate 01 and infrabasal plate 02 that are oppositely arranged, and the face down side of substrate 02 of upper substrate 01 has flatness layer 09 and is positioned at dottle pin nitride layer 10 on flatness layer, also comprises:
The multiple same layer be arranged between flatness layer 09 and dottle pin nitride layer 10 is arranged and the self-capacitance electrode 04 of mutually insulated, and in the touch-control time period by detecting the capacitance variation of respective capacitance electrode to judge the touch detection chip of position of touch.
The above-mentioned In-cell touch panel that the embodiment of the present invention provides, utilize the principle of self-capacitance to arrange multiple same layer at the upper substrate 01 of touch-screen to arrange and the self-capacitance electrode 04 of mutually insulated, when human body does not touch screen, the electric capacity that respective capacitance electrode 04 bears is a fixed value, when human body touching screen, the electric capacity that corresponding self-capacitance electrode 04 bears is fixed value superposition body capacitance, and touch detection chip can judge position of touch in the touch-control time period by the capacitance variation detecting respective capacitance electrode 04.Because body capacitance can act on whole self-capacitance, the projected capacitive in mutual capacitance only can be acted on relative to body capacitance, the touch-control variable quantity touched caused by screen by human body can be larger, therefore effectively can improve the signal to noise ratio (S/N ratio) of touch-control, thus improve the accuracy of touch-control sensing.
Further, need when being arranged between upper substrate and flatness layer relative to self-capacitance electrode that composition is carried out to flatness layer and expose the conducting tie point arranged with the same layer of self-capacitance electrode, this conducting tie point is electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, because self-capacitance electrode is arranged between the flatness layer of upper substrate and dottle pin nitride layer in the touch-screen that the embodiment of the present invention provides, therefore, can save and composition is carried out to flatness layer, the conducting tie point arranged with the same layer of self-capacitance electrode can be directly electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, save manufacture craft.
In the specific implementation, in order to the capacitance variation of respective capacitance electrode 04 effectively can be detected, touch detection chip can apply drive singal in the touch-control time period to respective capacitance electrode 04, and accept the feedback signal of respective capacitance electrode 04, the RC time delay of feedback signal can be increased by the be touched capacitance variation that causes of self-capacitance electrode 04, by judging that the feedback signal RC time delay of respective capacitance electrode 04 can determine whether self-capacitance electrode 04 is touched, thus location position of touch, certainly, by other modes such as detecting charge variation amount, touch detection chip can also confirm that the capacitance variation of respective capacitance electrode 04 is to judge position of touch, do not repeat at this.
Further, in order to reduce the mutual interference between display and touching signals, improve picture quality and touch-control accuracy, in the above-mentioned touch-screen that the embodiment of the present invention provides, the mode that touch-control and display stage can also adopt timesharing to drive, further, display driver chip and touch detection chip can also be integrated into a chip in the specific implementation, reduce production cost further.
Particularly, such as: in driver' s timing figure as shown in Figure 3, time touch-screen being shown each frame (V-sync) is divided into displaying time section (Display) and touch-control time period (Touch), in driver' s timing figure such as shown in Fig. 3, the time of display one frame of touch-screen is 16.7ms, choose wherein 5ms as the touch-control time period, other 11.7ms, as displaying time section, according to the duration of suitable both the adjustment of the processing power of IC chip, can certainly be not specifically limited at this.At displaying time section (Display), to every bar signal line Gate1, Gate2 in touch-screen ... Gaten applies scanning gate signal successively, applies grayscale signal, realize crystal display to data signal line Data.At touch-control time period (Touch), with respective capacitance electrode Cx1 ... the touch detection chip that Cxn connects is to each touch-control drive electrode Cx1 ... Cxn applies drive singal respectively, receive respective capacitance electrode Cx1 simultaneously ... the feedback signal of Cxn, by judging whether the analysis of feedback signal touch-control to occur, to realize touch controllable function.
The above-mentioned In-cell touch panel that the embodiment of the present invention provides, the respective capacitance electrode 04 arranged at upper substrate 01 can same layer, therefore, need to arrange two-layer rete in existing array base palte when realizing touch controllable function relative to employing mutual capacitance principle, only needing in the touch-screen that the embodiment of the present invention provides, one deck self-capacitance electrode 04 is set and can realize touch controllable function, save production cost, improve production efficiency.
Further, as shown in Figure 2, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, can also comprise: be arranged at the black matrix layer 03 between upper substrate 01 and infrabasal plate 02;
The orthogonal projection of figure on infrabasal plate 02 of respective capacitance electrode 04 can be positioned at the figure region of black matrix layer 03.
Figure due to respective capacitance electrode 04 is all arranged on the region at the figure place of black matrix layer 03, and the electric field that self-capacitance electrode produces can not affect the electric field in pixel openings region, therefore, can not affect normal display; And the respective capacitance electrode being arranged on black matrix layer graph shealtering region can also avoid self-capacitance electrode 04 to affect the transmitance of touch-screen.
Usually, the density of touch-screen usually at grade, therefore, in the specific implementation, the density of respective capacitance electrode 04 and area occupied can be selected to ensure required touch-control density according to required touch-control density, capacitance electrode 04 is designed to the square-shaped electrode of about 5mm*5mm separately usually.And the density of display screen is usually at micron order, therefore, multiple pixel cells in the corresponding display screen of a general self-capacitance electrode 04 meeting, in order to ensure that the figure of respective capacitance electrode 04 does not take the open area of pixel cell, as shown in Figure 4, can the position corresponding with the open area of pixel cell in the figure of respective capacitance electrode 04 be cut out without figure, namely can be the fenestral fabric that orthogonal projection on infrabasal plate 02 is positioned at the figure region of black matrix layer 03 by the graphic designs of respective capacitance electrode 04, and in order to ensure the homogeneity of display, the gap location of general each sub-pixel unit in each pixel cell is provided with the figure of self-capacitance electrode 04, in Fig. 4, each group RGB sub-pixel unit forms a pixel cell.The spacing of self-capacitance electrode of the touch-screen that in the embodiment of the present invention, the density of indication refers to or the spacing (Pitch) of the pixel cell of display screen.
Further, for the ease of the capacitance variation of touch detection chip detection capacitance electrode separately, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, as shown in Figure 5 a, can also comprise: with respective capacitance electrode 04 wire 05 one to one, and with self-capacitance electrode 04 conducting tie point 06 one to one; Wherein, each conducting tie point 06 is generally arranged on the frame adhesive region of In-cell touch panel, and in order to not affect normal Presentation Function, the orthogonal projection of each wire 05 on infrabasal plate 02 also should be positioned at the figure region of black matrix layer 03; After respective capacitance electrode 04 is connected to conducting tie point 06 by wire 05, be electrically connected with the splicing ear 08 of touch detection chip by the cabling 07 being positioned at frame adhesive region.Show the situation of 8 self-capacitance electrodes 04 in a line in fig 5 a, can be one with the number of self-capacitance electrode 04 wire 05 and conducting tie point 06 one to one, also can be multiple, not limit at this.
In the specific implementation, wire 05 and conducting tie point 06 are generally and self-capacitance electrode 04 is same is arranged on upper substrate 01; The splicing ear 08 of cabling 07 and touch detection chip is generally arranged on infrabasal plate 02.In the specific implementation, in order to reduce rete quantity and patterning processes in touch-screen as far as possible, each wire 05 can be arranged with layer with respective capacitance electrode 04, wire 05 as shown in Figure 5 b and self-capacitance electrode 04 are all arranged between the flatness layer 09 of upper substrate 01 and dottle pin nitride layer 10.But, owing to adopting the figure of layer of metal layer design self-capacitance electrode 04 and wire 05, in order to avoid the phenomenon be short-circuited between respective capacitance electrode 04, the wire 05 connecting respective capacitance electrode 04 needs non-cross, therefore, when adopting traditional wire laying mode design wire, namely as shown in Figure 5 a, the wire 05 be connected with all self-capacitance electrodes 04 all extends along a direction, and be connected on the conducting tie point 06 of the correspondence be arranged in same side area, a large amount of touch-control blind areas can be there is in touch-screen, Fig. 5 a shows the touch-control blind area that 8 self-capacitance electrodes 04 are in a row formed, the figure only illustrating self-capacitance electrode 04 in fig 5 a and the pattern of wire 05 be connected with respective capacitance electrode 04, the figure of not shown each sub-pixel unit, and, conveniently watch, different filling pattern is adopted to show region shared by respective capacitance electrode 04 in fig 5 a.The wire 05 connecting multiple self-capacitance electrode in touch-control blind area all passes through this touch-control blind area, and therefore, the signal in this touch-control blind area is relatively disorderly, so be called touch-control blind area, the touch-control performance namely in this region cannot ensure.
In order to reduce the area of touch-control blind area as far as possible, four sides that can have in the frame adhesive region of In-cell touch panel all distribute conducting tie point 06, namely conducting tie point 06 all has distribution at four sides of frame adhesive region, like this, by wire 05, respective capacitance electrode 04 is connected to respectively the conducting tie point 06 of the correspondence being arranged on viewing area surrounding, the area of touch-control blind area can be reduced on the whole.
The design of the above-mentioned minimizing touch-control blind area that the embodiment of the present invention provides is described for 5 cun of touch-screens, self-capacitance electrode 04 quantity needed in 5 cun of touch-screens is about 22*12=264, as shown in Figure 6, in order to each self-capacitance electrode 04 being introduced into corresponding conducting tie point 06 place, and reduce the area of touch-control blind area as far as possible, all self-capacitance electrodes 04 can be divided into 8 region: PartA ~ PartH, the splicing ear 08(FPCBondingPad of the touch detection chip self-capacitance electrode 04 in region being connected to one by one below, viewing area (Pane) is needed in each region) place, wherein, as shown in Figure 7, each region all illustrates 3 self-capacitance electrodes 04 in the figure 7, the respective capacitance electrode in PartA region is drawn from the region, upper left side of Panel, FPCBondingPad is introduced into through Panel left frame, the respective capacitance electrode in PartB region after the top extraction of Panel, then is introduced into FPCBondingPad from the left frame of Panel, the respective capacitance electrode in PanelC region after the top extraction of Panel, then is introduced into FPCBondingPad from the left frame of Panel, the respective capacitance electrode in PartD region is drawn the laggard left frame crossing Panel from the upper right side of Panel and is introduced into FPCBondingPad, in like manner, the respective capacitance electrode in PartE region is after the lower left extraction of Panel, and the left frame through Panel is introduced into FPCBondingPad, the respective capacitance electrode in PartF region is connected directly to FPCBondingPad after the below extraction of Panel, the respective capacitance electrode in PartG region is connected directly to FPCBondingPad after the below extraction of Panel, the respective capacitance electrode in PartH region is drawn from the lower right of Panel, is introduced into FPCBondingPad through Panel left frame.
Particularly, the annexation of part self-capacitance electrode 04 and conducting tie point 06 is illustrate only for the ease of viewing Fig. 7, as can be seen from Figure 7, be positioned at the PartA of both sides, viewing area, PartD, in PartE and PartH, the size of touch-control blind area is about the height of 3 sub-pixel unit, represent with h in the figure 7, estimate with the size of pixel cell corresponding in 5 cun of touch-screens, touch-control blind area is about 260 μm, be positioned at the PartB of both sides, viewing area, PartC, in PartF and PartG, the size of touch-control blind area is about the width of 10 sub-pixel unit, represent with w in the figure 7, estimate with the size of pixel cell corresponding in 5 cun of touch-screens, touch-control blind area is about 290 μm.
Above-mentioned self-capacitance electrode 04 only illustrates with the annexation of conducting tie point 06, can design according to the concrete size of touch-screen when actual design, in order to maximize the area reducing touch-control blind area, the conducting tie point 06 corresponding with respective capacitance electrode 04 can be distributed in the side edge from the nearest frame adhesive region of self-capacitance electrode 04, the length of the wire 05 connected between self-capacitance electrode 04 and conducting tie point 06 can be shortened so as much as possible, to reduce the area of touch-control blind area as much as possible.
Further, in order to thoroughly eliminate the touch-control blind area occurred in touch-screen, self-capacitance electrode 04 and the different layer of wire 05 can be arranged, wire 05 is arranged between upper substrate 01 and flatness layer 09, can wire 05 be arranged between flatness layer 09 and black matrix layer 03 such as shown in Fig. 8, and self-capacitance electrode 04 is electrically connected by via hole with corresponding wire 05, traditional wire laying mode can be adopted like this when designing the annexation of wire 05, as shown in Figure 9, namely the wire 05 be connected with all self-capacitance electrodes 04 all extends along a direction, and be connected on the conducting tie point 06 of the correspondence be arranged in the same side area of frame adhesive region.
Further, in the In-cell touch panel that the embodiment of the present invention provides, because body capacitance to act on the self-capacitance of respective capacitance electrode 04 by direct-coupled mode, therefore, during human body touching screen, the capacitance amount of having a greater change of the self-capacitance electrode 04 only below touch location, the capacitance variation amount of the self-capacitance electrode 04 adjacent with the self-capacitance electrode 04 below touch location is very little, like this, when sliding on the touchscreen, can not determine the touch-control coordinate in self-capacitance electrode 04 region, for head it off, in the above-mentioned In-cell touch panel that the embodiment of the present invention provides, adjacent two sides that self-capacitance electrode 04 is relative all can be set to broken line, to increase the capacitance variation amount being positioned at the adjacent self-capacitance electrode 04 of self-capacitance electrode 04 below touch location.
In the specific implementation, can adopt the mode of one of the following two kinds mode or combination that the global shape of respective capacitance electrode 04 is set:
1, the side for broken line relative for adjacent two self-capacitance electrodes 04 all can be set to step structure, two step structure shapes unanimously and mutually mate, as shown in Figure 10 a, have illustrated 2*2 self-capacitance electrode 04 in Figure 10 a;
2, the side for broken line relative for adjacent two self-capacitance electrodes 04 all can be set to concave/convex-shaped structure, two concave/convex-shaped structure shapes unanimously and mutually mate, as shown in fig. lob, have illustrated 2*2 self-capacitance electrode 04 in Figure 10 b.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device, comprise the above-mentioned In-cell touch panel that the embodiment of the present invention provides, this display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The enforcement of this display device see the embodiment of above-mentioned In-cell touch panel, can repeat part and repeats no more.
The In-cell touch panel that the embodiment of the present invention provides and display device, utilize the principle of self-capacitance to arrange multiple same layer at the upper substrate of touch-screen to arrange and the self-capacitance electrode of mutually insulated, when human body does not touch screen, the electric capacity that respective capacitance electrode bears is a fixed value, when human body touching screen, the electric capacity that corresponding self-capacitance electrode bears is fixed value superposition body capacitance, and touch detection chip can judge position of touch in the touch-control time period by the capacitance variation detecting respective capacitance electrode.Because body capacitance can act on whole self-capacitance, the transmission electric capacity in mutual capacitance only can be acted on relative to body capacitance, the touch-control variable quantity touched caused by screen by human body can be larger, therefore effectively can improve the signal to noise ratio (S/N ratio) of touch-control, thus improve the accuracy of touch-control sensing.And, need in existing array base palte, increase two-layer new rete when realizing touch controllable function relative to employing mutual capacitance principle, only need to increase one deck self-capacitance electrode in the touch-screen that the embodiment of the present invention provides and can realize touch controllable function, save production cost, improve production efficiency.
Further, need when being arranged between upper substrate and flatness layer relative to self-capacitance electrode that composition is carried out to flatness layer and expose the conducting tie point arranged with the same layer of self-capacitance electrode, this conducting tie point is electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, because self-capacitance electrode is arranged between the flatness layer of upper substrate and dottle pin nitride layer in the touch-screen that the embodiment of the present invention provides, therefore, can save and composition is carried out to flatness layer, the conducting tie point arranged with the same layer of self-capacitance electrode can be directly electrically connected by the splicing ear of frame adhesive with the touch detection chip being positioned at infrabasal plate, save manufacture craft.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (11)
1. an In-cell touch panel, comprises the upper substrate and infrabasal plate that are oppositely arranged, and described upper substrate has flatness layer towards the side of described infrabasal plate and is positioned at dottle pin nitride layer on flatness layer, it is characterized in that, also comprises:
The multiple same layer be arranged between described flatness layer and described dottle pin nitride layer is arranged and the self-capacitance electrode of mutually insulated, and in the touch-control time period by detecting the capacitance variation of each described self-capacitance electrode to judge the touch detection chip of position of touch.
2. In-cell touch panel as claimed in claim 1, is characterized in that, also comprise: be arranged at the black matrix layer between described upper substrate and described infrabasal plate;
The orthogonal projection of figure on described infrabasal plate of each described self-capacitance electrode is positioned at the figure region of described black matrix layer.
3. In-cell touch panel as claimed in claim 2, is characterized in that, the figure of each described self-capacitance electrode is the fenestral fabric that orthogonal projection on described infrabasal plate is positioned at the figure region of described black matrix layer.
4. In-cell touch panel as claimed in claim 2, is characterized in that, also comprise: with each described self-capacitance electrode wire one to one, and with described self-capacitance electrode conducting tie point one to one; Wherein,
The orthogonal projection of each described wire on described infrabasal plate is positioned at the figure region of described black matrix layer, and each described conducting tie point is arranged on the frame adhesive region of described In-cell touch panel;
After each described self-capacitance electrode is connected to described conducting tie point by described wire, be electrically connected by the splicing ear of the cabling and described touch detection chip that are positioned at described frame adhesive region.
5. In-cell touch panel as claimed in claim 4, it is characterized in that, each described wire and each described self-capacitance electrode are arranged with layer.
6. In-cell touch panel as claimed in claim 5, it is characterized in that, the frame adhesive region of described In-cell touch panel has four sides, and described conducting tie point all has distribution at four sides of described frame adhesive region.
7. In-cell touch panel as claimed in claim 6, it is characterized in that, the conducting tie point of answering with each described self-capacitance electrode pair is distributed in the side edge from the nearest frame adhesive region of described self-capacitance electrode distance.
8. In-cell touch panel as claimed in claim 4, it is characterized in that, described wire and the different layer of described self-capacitance electrode are arranged, and described wire is arranged between described upper substrate and described flatness layer, and described self-capacitance electrode is electrically connected by via hole with corresponding wire.
9. the In-cell touch panel as described in any one of claim 1-8, is characterized in that, the side that adjacent two described self-capacitance electrodes are relative is broken line.
10. In-cell touch panel as claimed in claim 9, is characterized in that, the side for broken line that two adjacent self-capacitance electrodes are relative all has step structure, and two step structure shapes unanimously and mutually mate; Or,
What two adjacent self-capacitance electrodes were relative all has concave/convex-shaped structure for the side of broken line, and two concave/convex-shaped structure shapes unanimously and mutually mate.
11. 1 kinds of display device, is characterized in that, comprise the In-cell touch panel as described in any one of claim 1-10.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090141.7A CN103885660B (en) | 2014-03-12 | 2014-03-12 | A kind of In-cell touch panel and display device |
| US14/436,810 US9830028B2 (en) | 2014-03-12 | 2014-08-15 | In-cell touch panel with self-capacitive electrodes and display device |
| PCT/CN2014/084550 WO2015135289A1 (en) | 2014-03-12 | 2014-08-15 | Imbedded touchscreen and display device |
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| CN201410090141.7A CN103885660B (en) | 2014-03-12 | 2014-03-12 | A kind of In-cell touch panel and display device |
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| CN103885660A CN103885660A (en) | 2014-06-25 |
| CN103885660B true CN103885660B (en) | 2016-04-06 |
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| US (1) | US9830028B2 (en) |
| CN (1) | CN103885660B (en) |
| WO (1) | WO2015135289A1 (en) |
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| CN103793120A (en) * | 2014-01-28 | 2014-05-14 | 北京京东方光电科技有限公司 | In cell touch panel and display device |
| CN103885660B (en) | 2014-03-12 | 2016-04-06 | 京东方科技集团股份有限公司 | A kind of In-cell touch panel and display device |
| CN103970392B (en) | 2014-04-18 | 2019-10-01 | 京东方科技集团股份有限公司 | A kind of touch screen and display device |
| CN104142772B (en) * | 2014-07-24 | 2017-05-03 | 京东方科技集团股份有限公司 | Embedded type touch screen and display device |
| CN104166476A (en) | 2014-07-28 | 2014-11-26 | 京东方科技集团股份有限公司 | Touch control display panel, control method of touch control display panel and touch control display device |
| CN104298409B (en) * | 2014-09-16 | 2017-05-03 | 京东方科技集团股份有限公司 | Touch screen and display device |
| CN104657022B (en) * | 2015-03-06 | 2019-06-07 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN104793387A (en) * | 2015-05-08 | 2015-07-22 | 上海中航光电子有限公司 | Display panel and display device |
| JP6585404B2 (en) * | 2015-07-10 | 2019-10-02 | シャープ株式会社 | Image display device |
| CN106708339B (en) * | 2015-10-26 | 2023-12-15 | 京东方科技集团股份有限公司 | Embedded touch screen, driving method thereof and display device |
| CN107193153A (en) * | 2017-07-28 | 2017-09-22 | 武汉华星光电技术有限公司 | Colored filter of in-cell touch panel and preparation method thereof |
| US11449172B1 (en) * | 2021-06-25 | 2022-09-20 | Himax Technologies Limited | Touch control apparatus and touch panel thereof |
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| TW201350974A (en) * | 2012-06-08 | 2013-12-16 | Inv Element Inc | In-cell touch display panel system with increased accuracy of touch positions |
| JP2015180979A (en) * | 2012-07-31 | 2015-10-15 | シャープ株式会社 | Touch panel and manufacturing method of touch panel |
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| CN103279244A (en) * | 2013-06-06 | 2013-09-04 | 敦泰科技有限公司 | Capacitive touch screen |
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|---|---|
| CN103885660A (en) | 2014-06-25 |
| US20160188031A1 (en) | 2016-06-30 |
| WO2015135289A1 (en) | 2015-09-17 |
| US9830028B2 (en) | 2017-11-28 |
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